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What else can I help you with?
Why wouldn't you expect to find human fossils and dinosaur fossils together in rocks dated similarly?
Because they did not exsist at the same time.
True or False Fossils may be dated by either the relative dating method which determines the relative order of fossils or by the absolute dating method which uses radioactive isotopes?
True. Fossils can be dated using both relative dating methods, which determine the sequence of events in which fossils occurred, and absolute dating methods, which rely on radioactive isotopes to calculate the age of fossils.
When did Spinosaurus Go Extinct?
Spinosaurus fossils are dated to between 112 and 97 million years ago. They probably died out around 97 million years ago.
What era did the first Cats appear on the Earth?
Not sure what era but fossils of cats were found that dated back to the Eocene period. Cats came around in the 19th century.
When did apes and hominids diverge?
The first fossil remains that have been found were dated around 4.4 million years ago. These were the fossils of Ardipithecus Ramidus, which lived 1 million years before the last fossils that were found.
Why do scientist use radioisotopes to find the age of fossils?
Radiometric dating of fossils is not possible beyond roughly 70,000 years. However, when fossils are found in association with strata of volcanic and metamorphic rocks which can be dated radiometrically, a very accurate age of the fossils can be determined.
What is the age of fossils that can be measured by what dating?
Fossils themselves can very rarely be dated by any means...their age is usually judged by the geological assessment of the area and layer in which they are found
How are fossils dated and how does this relate to phylogenetic trees?
There are many different methods of dating fossils including their geological stratum and carbon dating. Phylogenetic trees are dated by their geological stratum because they have something called the COI gene that shows they have roots from a long time ago.
Can carbon dating be used to identify the age of index fossils?
No. Carbon dating is only effective for time periods less than 70,000 years. This excludes all the major index fossils, and is a very short geologic time span. Index fossils can be dated, however by their association in the geologic column with metamorphic and igneous rocks, which can be radiometrically dated.
How can the age of a rock be related to fossils?
If a lava flow or bed of volcanic ash was dated using isotopic dating methods and fossils were found in a sedimentary rock beneath the volcanic rock, it can be surmised that the fossils were older than the lava or ash. If the same species of fossils were found in another part of the world it would make sense that the rocks there were the same age as previous fossils. By cross checking with many other areas with other volcanic rocks, it can be found that all the rocks around the world containing those fossils were of a similar age.
How old are komodo dragons?
Fossils of Komodo dragons have been dated to a little less than 4 million years ago.
Can any fossil be dated by the amount of carbon -14?
No, only organic materials containing carbon can be dated using carbon-14 dating. Fossils that contain no carbon, such as those composed of minerals like rocks or shells, cannot be dated using carbon-14.
